Physical phase-split dynamic polymer and application thereof

A polymer and dynamic technology, applied in the field of physical phase-separated dynamic polymers, can solve problems such as lack of dynamics, inability to use elastomers, and poor mechanical properties

Pending Publication Date: 2018-07-31
厦门天策材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when only physical crosslinking is used, if the crosslinking density is low (the chain between crosslinking points is longer/the functionality of crosslinking points is low), the crosslinked polymer tends to be relatively soft and has poor mechanical properties; However, if the cross-linking density is high (longer chains between cross-linking points/higher cross-linki

Method used

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  • Physical phase-split dynamic polymer and application thereof
  • Physical phase-split dynamic polymer and application thereof
  • Physical phase-split dynamic polymer and application thereof

Examples

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preparation example Construction

[0270] A preferred preparation method of a dynamic polymer ionic liquid gel of the present invention includes but is not limited to the following steps: blending the raw materials for preparing dynamic polymers with ionic liquids, so that the mass fraction of raw materials for preparing dynamic polymers is 0.5- 70%, polymerization, coupling or other types of chemical reactions are carried out through the appropriate means, and after the reaction is completed, a dynamic polymer ionic liquid gel is produced. The preferred preparation method of another dynamic polymer ionic liquid gel of the present invention includes but not limited to the following steps: swelling the dynamic polymer in a solvent containing ionic liquid, so that the mass fraction of the dynamic polymer is 0.5-70% After fully swelling, the solvent is removed to form a dynamic polymer ionic liquid gel. The above-mentioned ionic liquid is generally composed of organic cations and inorganic anions. As an example, t...

Embodiment 1

[0331] Commercially available styrene-butadiene-styrene triblock copolymer (SBS), 3-mercaptopropionic acid, and photoinitiator benzyldimethylketal (BDK) were reacted in tetrahydrofuran to maintain polybutadiene The molar ratio of alkenyl to 3-mercaptopropionic acid and BDK in the chain segment is about 50:5:1, and the modified SBS containing side carboxyl groups in the polybutadiene chain segment is obtained. Gained modified SBS and 2-aminomethylbenzeneboronic acid, 4-aminophenylboronic acid use 2-ethoxyl-1-ethoxycarbonyl-1,2-dihydroquinoline (EEDQ) as a condensing agent to keep the modified The molar ratio of carboxyl to 2-aminomethylphenylboronic acid and 4-aminophenylboronic acid in SBS is 2:1:1, in the dark at room temperature, in a mixed solvent with a volume ratio of dichloromethane / methanol of 2:1 After reacting for 16 hours, the modified SBS containing pendant aminomethylphenylboronic acid groups and pendant phenylboronic acid groups in the polybutadiene segment was ob...

Embodiment 2

[0336] Allyl boronic acid pinacol ester and equimolar equivalent of mercaptosuccinic acid were blended in tetrahydrofuran, and reacted under ultraviolet light in the presence of photoinitiator BDK to obtain compound 2a.

[0337] Compound 2a was reacted with excess polycaprolactone terminated by hydroxyl groups at both ends, and under the catalysis of dicycloethylcarbodiimide (DCC) and 4-dimethylaminopyridine (DMAP), a hydroxyl-terminated polycaprolactone at both ends was obtained. A polyester segment containing a pendant organoboronic acid cyclic ester group.

[0338]

[0339] Use benzoyl peroxide (BPO) as the initiator and mercaptoacetic acid as the chain transfer agent to initiate the polymerization of 4-vinylpyridine at 90-100°C, keeping the molar ratio of initiator, monomer and chain transfer agent at 1:30:1 , to obtain single-terminal carboxyl-terminated poly(4-vinylpyridine).

[0340] Mixing 1 molar equivalent of the obtained copolymer segment with 2 molar equivalent...

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Abstract

The invention discloses a physical phase-split dynamic polymer. The physically phase-splitting dynamic polymer contains dynamic polymer molecules including hard segments and soft segments at the sametime. The hard segments of the dynamic polymer molecules are mixed with each other and/or independent to form crystal phases and/or phases incompatible with the soft segments, so phase-split physicalcross-linking or cross-linking and polymerization based on the hard segments is formed; the soft segments of the dynamic polymer molecules are amorphous; the dynamic polymer molecules contain at leastone boron-containing dynamic covalent bond and an optional hydrogen bond group; and the boron-containing dynamic covalent bond and the optional hydrogen bond group provide dynamic reversibility, so the physical phase-split dynamic polymer has good toughness, energy dissipation performance, self repair performance and other performance. The physical phase-split dynamic polymer is extensively applicable to the body protection of people during exercises, daily life and working, the body protection of the military police, explosion prevention, protection in airborne landing and aerial delivery, collision prevention of automobiles, anti-impact protection of electronic materials, self-repairing sealing members, sealants, tough elastomers, etc.

Description

technical field [0001] The invention relates to a dynamic polymer, in particular to a physical phase-separated dynamic polymer containing boron-containing dynamic covalent bonds and polymer molecules with hard segments and soft segments. Background technique [0002] Cross-linking is a general method for polymers to form a three-dimensional network structure to achieve effects such as improving polymer elasticity, thermal stability and mechanical properties. Crosslinking can be chemical (covalent) or physical (non-covalent / supramolecular) crosslinking. Physical crosslinking has become a direction for the development of polymer elastomers because it is especially helpful to improve the processing properties of polymer elastomers. However, when only physical crosslinking is used, if the crosslinking density is low (the chain between crosslinking points is longer / the functionality of crosslinking points is low), the crosslinked polymer tends to be relatively soft and has poor ...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08L25/06C08L31/04C08L75/06C08L83/04C08K3/26C08K3/34C08G81/02C08J9/10C08J9/08
CPCC08G81/021C08G81/027C08J9/08C08J9/103C08L53/025C08L75/06C08J2203/04C08J2203/02C08J2453/02C08L2203/14C08L2205/025C08L2205/035C08J2375/06C08J2383/04C08J2353/02C08L25/06C08L31/04C08K2003/265C08L83/04C08K3/346C08G79/08C08G81/02C08J9/10C08K3/26C08K3/34C08L53/02
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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